Tablet



u. c. UPJOHN. v

TABLET.

APPLICATION FILED JUNE 30. m9.

1,361, 1 18.- Patented Dec. 7, 1920.

URIAH C. UPJOHN, OF CHICAGO, ILLINOIS.

TABLET.

Specification of Letters Patent.

Patented Dec. ,7, 1920.

Application filed June 30, 1919. Serial No. 307,558.

To all whom it may concern:

Be it known that I, URIAH C. UrJoHN, a citizen of the United States, residing at 134 S. La Salle St, Chicago, in the county of Cook and State of Illinois, have invented an Impovement in Tablets, of which the following is a specification.

This invention relates to tablets of paper. Its object is to produce a tablet of paper wherein the sheets are so firmly locked and bound together that the separation thereof is rendered practically impossible under the severest conditions of use, while at the same time the individual sheets may be torn off the tablet easily and conveniently.

Other objects and advantages of the invention will appear as the description to follow proceeds.

In the drawings, which represent an illustrative embodiment of the invention;

Figure 1 is a perspective view of the tablet made according to my invention shown with a number of the sheets torn off.

Fig. 2 is a plan view of the upper left hand corner of Fig. 1..

Fig. 3 is a cross sectional view on line 33 of Fig. 2.

The tablet made according to my invention comprises a block 1 of sheets of paper arranged upon a back piece 2 which may be made of cardboard or the like.

The sheets of the block 1 in the form shown are entirely free and unbound throughout the greater part of their edges, but are bound together and to the back piece at the upper left hand corner of the tablet when in position to be written upon.

The fact that the sheets are free, except at one corner, while facilitating the removal of the sheets thereof one by one makes it necessary to provide specially adequate means for locking the sheets and backing together.

These means comprise, preferably, an external binding strip 3 which is wrapped diagonally across and around the upper left hand corner of the tablet. The binding strip 3 is secured to the top sheet of the tablet to the edges and to the bottom of the back piece by adhesive and its ends 4.- extend considerably under the backing piece where they are likewise secured by adhesive. This forms a strong binding for securing the sheets and back piece of the tablet firmly .together and maintaining the integrity of the tablet.

The binding st rip 3 may be fabric or paper properly affixed by adheslve.

It will be observed that the binding strip 3 alone only touches the sheets in the middle of the tablet, at a portion of their edges. For this reason additional means are provided to prevent the loosening of such sheets from the tablet under severe conditions of use or abuse. These means comprise the locking pillars shown at 5. These are preferably made of dried glue or other adhesive. The pillars 5 pass vertically through the sheets of thetablet. Inthe form shown in the drawings the two outer pillars 5 connect the oppositely faced inner sides of the binding strip 3 at the top and bottom of the tablet. The center pillar (Fig. 3) connecting with the under surface of the binding strip 3 passes through the tablet and terminates in the backing 2.

The pillars 5 may be arranged diagonally as shown in the drawings and parallel with the diagonal inner edge of the binding strip 3. It is of course obvious that any desired number of these pilars may be employed, and that other specific arrangements thereof may be utilized.

The construction describedis extremely inexpensive and extremely efiicacious. Thus each sheet in the tablet while free around the greater portion of its edges, is so firmly locked at one corner that the tablet will not break up under the severest conditions of abuse. Each sheet is locked not only by the binding strip but is additionally locked positively by the pillars of dried adhesive which pass through the same. These pillars serve additionally to lock the backing and binding strip together. The adhesive on the binding strip 3 and in the pillars 5 is substantially in one piece.

The diagonal arrangement of the strip 3 conduces materially to convenience in removing sheets successively from the tablet. Thus when it is desired to tear the top remaining sheet from the tablet, an ordinary tearing motion of the sheet will tear the sheet 01f neatly acrossthe short diagonal line at the inner margin of the binding strip 3. As each sheet is torn off its corner portion, being firmly locked in the corner binding, remains behind and presents a new backed straight edge upon which the succeeding sheet tears. The corners are so firmly locked in position that a smooth and even tear may be accomplished throughout the removal of all the sheets. The condition of the tablet when about half the sheets have been torn off is illustrated in Fig. 1': wherein the firm backing given to the diagonal edge of the last sheet torn off by the corner binding means may be seen. 7

Having now' described my invention I claim: 7

1. A tablet comprising a block of sheets of paper, a backing of cardboard orthe like, the sheets being free at their edges except at one corner, a fabric binding upon said corner fastened to the top, sides and back of the tablet by adhesive, and pillars of dried adhesive passing through sheets of paper within the portion thereof at said corner bound by the fabric.

2. A tablet comprising a block of sheets of paper, a fastening member extending through the sheets at a corner of the block, and a binding passing around said corner, a margin of said binding extending beyond said fastening member, and defining the line along which the sheets are successively torn from the block.

3. A tablet comprising a block of sheets of paper, a pillar of dried adhesive passing through the sheets adjacent a corner'thereof, to lock and bind the sheets together.

4. A tablet comprising a block of sheets of paper, a pillar of dried adhesive passing through the sheets adjacent a corner thereof,

to lock and bind the sheets together, said sheets being additionally bound at their edges adjacent said corner by dried adhesive.

5. A tablet comprising a block of sheets of paper arranged upon a backing sheetof relatively stiff material, said block being bound together at one corner by a binding fastened about said corner, and a pillar of dried adhesive passing through said sheets to lock the same in position within the binding.

6. A tablet comprising a block of sheets of paper upon a relatively stiff backing sheet, a binding wrapped diagonally upon one corner of the block, and attached thereto by adhesive, and pillars of dried adhesive passing through the sheets of paper Within the binding, the adhesive connecting the binding to the block and that comprising the pillars being continuous, whereby the sheets are both firmly bound and positively locked in place within the binding.

' 7. A tablet comprising a block of sheets of paper, mounted upon a relatively stifi' backing sheet, a binding strip wrapped diagonally upon the upper left hand corner of the block and embracing and secured by adhesive to the bottom of the backing strip, the top and the edges of the block, and pillars of dried adhesive continuous with and connecting the adhesive on the binding strip under the backing sheet and the adhesive on the binding strip over the top sheet, said pillars passing through the sheets and locking the same firmly in place,

8. A tablet comprising a block of sheets of paper, a binding strip passing around adjacent edges and one face of the block, and a fastening member passing through the block beneath said binding strip.

In testimony whereof I have signed my name to this specification.

URIAH C. UPJOHN. 

